Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf494eeeb7a7788…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 12:48:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1f801cf2648293679245da30d60f05f2 SHA-1: fc8f9ba73ff72c8f09582db1816502d4204f518e SHA-256: 2bf494eeeb7a7788639d9f0f50f428958571e77699be45b87abe1e4addcc843b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game hacks or generators. The primary malicious URL identified is http://netcdn.tw/app/479516143/play-minecraft-pocket-edition-for-free-game-hack. The document's content and embedded links strongly suggest a phishing or scam attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/479516143/play-minecraft-pocket-edition-for-free-game-hack In PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/como-hackear-roblox-para-tener-robux-facil_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/robloxhacks_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/lucky-patcher-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/roblox-g_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/pokemon-go-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/roblox-developer-console-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/roblox-speed-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/how-to-hack-jailbreak-in-roblox-2021-infinite-money_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/more-robux_GM431946152.pdfIn PDF document text
    • http://www.bestbist.com/assets/uploads/pages/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3273 22236 bytes
SHA-256: c90e24aa9bb00217ab67c652e335774c55d2c4c73de64aa245d7f026dbc2c2e0
font_01_sfnt_off00006393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6393 18752 bytes
SHA-256: 1c750ae825fc9a886ea70e83678fe12c2f590e2b55fff129ba454ba43f005414